TW202245717A - Hand skin and manufacturing method thereof for enhancing structural strength to prevent collapse and achieving more realistic visual effect - Google Patents

Abstract

A manufacturing method of hand skin includes the following steps: providing an inner mold core in the shape of a hand, wherein the inner mold core is provided with a plurality of fingers; covering the inner mold core with silicone several times; covering the silicone with a plaster bandage and taking out the inner mold core to obtain a hollow outer mold in the shape of a hand; formulating a first hand skin material and pouring on the inner surface of the outer mold corresponding to the nails and knuckles of human hand; formulating a second hand skin material and pouring into the outer mold; removing the outer mold and taking out a glove with the first hand skin material and the second hand skin material; fitting a sock onto the inner mold core and coating the sock with the silicone; formulating a third hand skin material and pouring into the glove and fitting the inner mold core into the glove; and, taking out the inner mold core and combining the glove with the third hand skin material and the sock to obtain a hand skin.

Description

Leather and its manufacturing method

The invention relates to a manufacturing method, in particular to a hand leather and its manufacturing method.

Prosthetics are an indispensable and important life aid for people with physical disabilities. In order to make the appearance of prosthetics similar to human limbs, a layer of skin that mimics the surface of human limbs is usually placed on the surface of the movable prosthetics. , the main function is to make the use of prosthetics difficult for other people to directly perceive the effect of prosthetics. The covering used on prosthetic hands is called hand skin. Considering the extensibility and durability of the existing hand leather, its hardness is relatively soft, resulting in insufficient support of the overall structure, resulting in a collapsed appearance, and the visual effect is not realistic enough. There is still room for improvement.

Therefore, one of the objectives of the present invention is to provide a method for manufacturing hand leather that can solve at least one of the aforementioned problems.

Therefore, another object of the present invention is to provide a hand leather that can solve at least one of the aforementioned problems.

The manufacturing method of the hand skin of the present invention includes the following steps: providing an inner mold core in the shape of a human hand, the inner mold core has a plurality of fingers; covering the inner mold core with a silicone material for multiple times; covering the silicone material with a plaster bandage And the inner mold core is taken out to obtain a hollow outer mold in the shape of a human hand, the outer mold has an inner surface, the inner surface has a plurality of nails and a plurality of knuckles, the nails and the The knuckles correspond to the nails and knuckles of the human hand; a first skin material is prepared and poured into the nails and the knuckles on the inner surface of the outer mold; a second skin is prepared material and pour it into the outer mold; remove the outer mold and take out a glove with the first leather material and the second leather material; connect a sock to the inner mold core, and use silicone material Coating on the sock cover; preparing a third hand leather material and pouring it into the glove, and putting the inner mold core into the glove; and taking out the inner mold core, making the glove and the third hand leather The material and the sock are combined to obtain a leather.

In some implementations, the step of providing the inner mold includes the following sub-steps: providing a hollow inner mold in the shape of a human hand; covering the inner mold with a plaster bandage; mixing polystyrene and plaster into a first A material; blending the polystyrene glue and a hardener into a second material; and pouring the first material and the second material into the inner mold to obtain the inner mold core.

In some embodiments, in the step of preparing the first material, the weight ratio of the polystyrene gum to the gypsum is 10:3, and the polystyrene gum and the gypsum are stirred and vacuumized, and the first material And the second material is poured into the inner mold at the same time.

In some embodiments, in the step of preparing the second material, the weight ratio of the polystyrene to the hardener is 20:1, and the first material and the second material are poured into the inner mold at the same time .

In some embodiments, a step is further included after obtaining the outer mold, the step is to coat the polystyrene glue on the outer mold for several times.

In some embodiments, a step is further included after coating the polystyrene, the step is to wrap the glass fiber on the polyplastic in the outermost layer of the outer mold for several times.

In some embodiments, the method further includes a step of cleaning the leather, grinding the rough edge of the leather and repairing holes in the leather.

In some embodiments, a step after repairing the skin is further included, the step is to leave the skin for at least 24 hours.

In some embodiments, a step after repairing the skin is further included, the step is heating the skin to 40-60 degrees for at least 12 hours.

In some embodiments, in the step of fitting the sock cover, the fingers of the inner mold core are coated with silicone material first, then the sock cover is placed on the inner mold core, and finally the silicone material is applied Apply to the sock.

The hand leather of the present invention comprises an inner layer, which is hollow and hand-shaped, and includes a sock cover and a body covering the sock cover; an outer layer, which covers the outer surface of the inner layer; and a decorative unit, arranged on On the outer surface of the outer layer, the decoration unit includes a plurality of nails and a plurality of knuckles.

In some embodiments, the main body of the inner layer, the outer layer and the decoration unit are all made of silicone.

The present invention has at least the following effects: because the hand skin is obtained by combining the glove with the third hand skin material and the sock cover, the sock cover can increase the supporting force of the overall structure of the hand skin, improve the structural strength and make the appearance unsightly It will be collapsed, and the visual effect is more realistic.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to FIGS. 1 to 4 , one embodiment of the manufacturing method of the hand skin of the present invention is suitable for manufacturing a hand skin 10 as a cover set on the surface of a prosthetic hand (not shown). The manufacturing method of the hand leather 10 includes the following steps S1-S13.

In step S1 , a hand-shaped inner mold core 4 is firstly provided. The inner mold core 4 is shaped like a human hand and has a palm 41 and five fingers 42 . Specifically, this step S1 includes the following sub-steps: first provide a hollow hand-shaped inner mold by 3D printing, and then cover the inner mold with a plaster bandage. Next, a polystyrene glue and a gypsum are blended into a first material, and the first material is vacuumized, and then the polyflor glue and a hardener are blended into a second material, and finally the first material is And the second material is poured into the inner mold at the same time to obtain the inner mold core 4 . Wherein, the weight ratio of the Polyglue to the gypsum is 10:3, and the weight ratio of the Polyglue to the hardener is 20:1. And after taking out this inner mold kernel 4, can continue to carry out repair operation and outward appearance full soil and mold repair operation to this inner mold kernel 4.

In step S2, the inner mold core 4 is covered with silicone material for several times. Specifically, a total of three times of full-covering operations are performed with silicone materials, but this is not a limitation. Then proceed to step S3, wrap the silicone material with a plaster bandage and take out the inner mold core 4 to obtain a hollow hand-shaped outer mold 5, the outer mold 5 has an inner surface 51, and the inner surface 51 has The nails 511 and the knuckles 512 correspond to the nails and the knuckles of the human hand respectively. Next, steps S4 and S5 are performed for reinforcing the outer mold 5 . In step S4 , polystyrene is coated on the outer mold 5 for several times. Specifically, the number of times of coating is four, but it is not limited thereto. In step S5, glass fibers are coated on the outermost polystyrene of the outer mold 5 for several times. Specifically, the number of wrapping times is four, but it is not limited thereto. Each operation takes about 20 to 30 minutes, and the coating can be strengthened once more depending on the situation. Finally, depending on the situation, a finger covering mold can be locked on the outer mold 5 corresponding to the finger to prevent it from breaking.

In step S6 , a first hand skin material is prepared and poured into the nails 511 and the knuckles 512 of the inner surface 51 of the outer mold 5 . Specifically, the inner surface 51 of the outer mold 5 corresponding to the crescent of the nail of the hand is marked with an oil-based ballpoint pen in advance, and left for at least one day. Then the first-hand skin materials corresponding to the nails and crescents are prepared respectively. The part of the nail plate is made of red silicone and ordinary silicone raw materials in a weight ratio of 10:1. In fact, 1g is used for 0.1g. The part of the crescent is made of gray-white silicone and ordinary silicone raw materials in a weight ratio of 10:1. In fact, the ratio of 0.5g to 0.05g~0.1g is used. The knuckle part is made of dark silicone and general silicone raw materials in a weight ratio of 10:1, and the ratio of 0.5g to 0.05g~0.1g is actually used. After the deployment is completed, the first hand skin material is poured into the nails 511 and the knuckles 512 of the inner surface 51 of the outer mold 5 with thin tubes.

In step S7, a second leather material is prepared and poured into the outer mold 5 . Specifically, the second leather material is prepared by blending skin color silicone and general silicone raw materials in a weight ratio of 10:1, and the second leather material is poured into the outer mold 5, and then the outer mold is shaken 5. Make the second leather material flow evenly on the inner surface 51 of the outer mold 5, remove particles and adjust the thickness of the second leather material.

In step S8, the outer mold 5 is removed and a glove with the first leather material and the second leather material is taken out. Specifically, the glove is a semi-finished product, and after taking it out, the burrs of the fingers and the opening of the glove will be removed.

In step S9, a sock 11 is sleeved on the inner mold core 4, and the sock 11 is coated with a silicone material. Specifically, the silicone material is first coated on the five fingers 42 of the inner mold core 4 , then the sock 11 is sleeved on the inner mold core 4 , and finally the silicone material is coated on the outer surface of the sock 11 . Then in step S10, a third hand leather material is prepared and poured into the glove, and the inner mold core 4 together with the sock cover 11 is put into the glove. Specifically, the third hand leather material is made of skin color silicone and general silicone raw materials in a weight ratio of 10:1, and the inner mold core 4 is put into the glove and then the tightness with the glove is adjusted, so that The third leather material can cover the sock 11 and combine with the sock 11 . Next in step S11 , the inner mold core 4 is taken out, and the glove is combined with the third hand leather material and the sock cover 11 to obtain a hand leather 10 . It should be noted that by coating the silicone material on the sock 11 , the sock 11 can be more easily adsorbed to the third leather material.

Then in step S12 , the leather 10 is cleaned and the burrs of the leather 10 are ground and holes in the leather 10 are repaired. Finally, step 13 is to leave the hand skin 10 for at least 24 hours, and the manufacturing method of the hand skin 10 of the present invention is completed. In other embodiments, the hand skin 10 can also be heated to 40-60 degrees and maintained for at least 12 hours, which is not limited by the method of this embodiment.

Referring to FIG. 4 and FIG. 5 , the hand leather 10 of the present invention includes an inner layer 1 , an outer layer 2 and a decoration unit 3 . The inner layer 1 is hollow and hand-shaped, and includes a sock 11 and a body 12 covering the sock 11 . The main body 12 is formed by hardening the aforementioned third hand leather material. The outer layer 2 is coated on the outer surface of the inner layer 1, and the outer layer 2 is hardened from the aforementioned second leather material. The decoration unit 3 is arranged on the outer surface of the outer layer 2 and is formed by hardening the aforementioned first leather material. The decoration unit 3 includes a plurality of nail parts 31 and a plurality of finger joint parts 32 , each nail part 31 has the aforementioned nail piece and crescent, and the finger joint parts 32 correspond to the aforementioned finger joint parts.

In summary, the manufacturing method of the hand leather 10 of the present invention is obtained by combining the hand leather 10 with the glove, the third hand leather material and the sock cover, and the sock cover 11 can increase the strength of the overall structure of the hand leather 10. The supporting force improves the structural strength so that the appearance will not be collapsed, and the visual effect is more realistic, so the purpose of the present invention can indeed be achieved.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

10: hand leather 1: inner layer 11: socks 12: Ontology 2: outer layer 3: Decoration unit 31:Nail Department 32: Knuckles 4: Inner mold core 41: palm 42: finger 5: Outer mold 51: inner surface 511:Nail Department 512: knuckles S1~S13: Steps

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a flow chart of an embodiment of the manufacturing method of hand leather of the present invention; Fig. 2 is a schematic plan view of an inner mold core of this embodiment; Fig. 3 is a schematic plan view of an outer mold of this embodiment; Fig. 4 is a schematic plan view of an embodiment of the hand leather of the present invention; and Fig. 5 is a schematic cross-sectional view of the embodiment of the leather of the present invention.

S1~S13: Steps

Claims (12)

A method for manufacturing hand leather, comprising the following steps: Provide an inner mold core in the shape of a human hand, the inner mold core has a plurality of fingers; Coating the inner mold core with silicone material multiple times; Wrap the silicone material with a plaster bandage and take out the inner mold core to obtain a hollow outer mold in the shape of a human hand, the outer mold has an inner surface with multiple nails and knuckles , the nails and the knuckles correspond to the nails and knuckles of the human hand, respectively; mixing and pouring a first leather material into the nails and the knuckles of the inner surface of the outer mould; deploying a second-hand leather material and pouring it into the outer mould; removing the outer mold and removing a glove with the first leather material and the second leather material; Connect a sock to the inner mold core, and coat the sock with silicone material; mixing and pouring a third-hand leather material into the glove, and fitting the inner mold core into the glove; and The inner mold core is taken out, and the glove is combined with the third leather material and the sock to obtain a leather. The manufacturing method as claimed in item 1, wherein the step of providing the inner mold core includes the following sub-steps: Provide a hollow inner mold in the shape of a human hand; Covering the inner mold with a plaster bandage; blending a styrofoam and a gypsum into a first material; compounding the styrofoam and a hardener into a second material; and The first material and the second material are poured into the inner mold to obtain the inner mold core. The manufacturing method according to claim 2, wherein, in the step of preparing the first material, the weight ratio of the polystyrene gum to the gypsum is 10:3, and the polystyrene gum and the gypsum are stirred and then vacuumized , the first material and the second material are poured into the inner mold at the same time. The manufacturing method according to claim 2, wherein, in the step of preparing the second material, the weight ratio of the polystyrene glue to the hardener is 20:1, and the first material and the second material are poured simultaneously into the inner mold. The manufacturing method as claimed in claim 1, further comprising a step after obtaining the outer mold, the step is to coat the polystyrene glue on the outer mold several times. The manufacturing method as described in Claim 5 further comprises a step after coating the polystyrene, which step is to coat the polyplastic on the outermost layer of the outer mold with glass fiber several times. The manufacturing method as claimed in claim 1, further comprising a step of cleaning the leather, grinding the rough edge of the leather and repairing holes in the leather. The manufacturing method according to claim 7, further comprising a step after repairing the leather, the step is to leave the leather for at least 24 hours. The manufacturing method according to claim 7, further comprising a step after repairing the leather, the step is to heat the leather to between 40 and 60 degrees for at least 12 hours. In the manufacturing method described in claim 1, in the step of fitting the sock cover, the fingers of the inner mold core are first coated with silicone material, and then the sock cover is placed on the inner mold core, and finally Coat the socks with silicone material. A kind of skin, comprising: An inner layer, the inner layer is hollow and hand-shaped, and includes a sock and a body covering the sock; an outer layer covering the outer surface of the inner layer; and A decoration unit is arranged on the outer surface of the outer layer, and the decoration unit includes a plurality of nail parts and a plurality of finger joint parts. The hand leather as claimed in item 11, wherein the main body of the inner layer, the outer layer and the decoration unit are all made of silicon rubber.

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